52 lines
1.6 KiB
Rust
52 lines
1.6 KiB
Rust
#![warn(clippy::all, clippy::pedantic)]
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use std::fs::File;
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use std::io::{prelude::*, BufReader};
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fn main() -> std::io::Result<()> {
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//Read in file
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let file = File::open("input")?;
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let reader = BufReader::new(file);
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let value = reader
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.lines()
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.map(|line| {
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let line = line.unwrap();
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// split and parse
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let (a, b) = match line.split(',').take(2).collect::<Vec<&str>>()[..] {
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[a, b] => (
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a.split('-')
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.take(2)
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.map(|x| x.parse::<i32>().unwrap())
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.collect::<Vec<i32>>(),
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b.split('-')
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.take(2)
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.map(|x| x.parse::<i32>().unwrap())
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.collect::<Vec<i32>>(),
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),
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_ => panic!("no good"),
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};
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(
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// part 1 wholly overlapping
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i32::from((a[0] <= b[0] && a[1] >= b[1]) || (a[0] >= b[0] && a[1] <= b[1])),
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// part 2 any overlapping
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i32::from(
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(a[0] >= b[0] && a[0] <= b[1])
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|| (a[1] >= b[0] && a[1] <= b[1])
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|| (b[0] >= a[0] && b[0] <= a[1])
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|| (b[1] >= a[0] && b[1] <= a[1]),
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),
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)
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})
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// using folding instead of sum() so that we can do both parts in one call
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.fold((0, 0), |mut acc: (i32, i32), x| {
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acc.0 += x.0;
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acc.1 += x.1;
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acc
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});
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println!("Part 1: {}", value.0);
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println!("Part 2: {}", value.1);
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Ok(())
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}
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